Tesla software update 2026.38.5.5 was listed on October 21, 2026, adding another build to the 2026.38.5 family. Official release notes are not yet available, so its precise changes, FSD version, and vehicle eligibility remain unconfirmed. The listing establishes a new entry in this software family; it does not by itself confirm that a rollout has begun or identify a specific problem being corrected.
The October 10 notes for 2026.38.5 provide useful background. They describe Halloween Mode for listed AMD-equipped vehicles, improved parked graphics for AMD-equipped HW3 Model 3 and Model Y, and pilot Supercharger site maps for Intel-equipped legacy Model S and Model X, Model 3, and Model Y. If this new build continues that configuration, some of those functions could remain relevant, subject to each feature's requirements.
That earlier release also describes phone-based Set Arrival Energy, requiring Tesla App 4.58.0 or later, and headlight leveling on specific Model 3 and Cybertruck vehicles. Its Emergency Drive Away function is strictly for emergencies: leaving with a Supercharger cable attached damages the vehicle and charger and may leave repair costs with the user. These are earlier documented features, not confirmed additions to 2026.38.5.5.
The October 13 notes for 2026.38.5.1 offer another comparison. They list FSD (Supervised) v14.3.12 for HW4 and v14.3 Lite for the specified HW3 Model S, Model 3, Model X, and Model Y. The latter describes smoother responses, fewer unnecessary slowdowns, parking and reversing, arrival preferences, and speed profiles. Separate start-from-Park and interface entries list HW3 Model 3 and Model Y, illustrating why related versions can have different eligibility.
Meanwhile, 2026.38.5.10 was listed on October 20 and now has its own official notes, including HW4 FSD v14.3.13. Its earlier listing date despite a higher final build number does not establish an upgrade sequence or prove that 2026.38.5.5 contains the same package. Either comparison remains provisional; no particular correction, new feature, or supported hardware group can be assigned to this build yet.
This article will be completed when official notes arrive, with confirmed changes, vehicle and hardware requirements, regional details, and appropriate illustrations. Until then, the preceding features are background for a possible continuation of the branch; all referenced supervised-driving functions require an attentive driver.
